Four-Coordinate Group-14 Elements in the Formal Oxidation State of Zero – Syntheses, Structures, and Dynamics of [{(CO)5Cr}2Sn(L2)] and Related Species
作者:Peter Kircher、Gottfried Huttner、Katja Heinze、Berthold Schiemenz、Laszlo Zsolnai、Michael Büchner、Alexander Driess
DOI:10.1002/(sici)1099-0682(199806)1998:6<703::aid-ejic703>3.0.co;2-h
日期:1998.6
resulting in [(CO)5M}2Sn(py)2] (1g: M = Cr, 1h: M = W). The bis-bidentate ligand 2,2′-bipyrimidine (bpmd) is found to coordinate just one [(CO)5M}2Sn] entity in [(CO)5M}2Sn(bpmd)] (2b: M = Cr, 2c: M = W). The biimidazolato (biim) ligand binds two [(CO)5Cr}2Sn] moieties in [(CO)5Cr}2Sn(biim)SnCr(CO)5}2]2–, 2a. It is shown by 1H-NMR that the pyrimidine entities in these compounds (2b, 2c) are able to rotate
钠盐 Na2[(CO)5M}2EX2] (M = Cr, Mo, W; E = Ge, Sn, Pb; X = Cl, I, OOCCH3) 与 2,2'-联吡啶 (bipy) 反应生成形成中性化合物 [(CO)5M}2E(bipy)] (E = Sn: 1a–1c; E = Ge: 3a; E = Pb: 4)。化合物 1a–1c 和 3a [(CO)5M}2E(phen)] (E = Sn: 1d–1f, E = Ge: 3b) 的 1,10-菲咯啉 (phen) 类似物也很容易获得。1 中的 2,2'-联吡啶配体可以被两个吡啶 (py) 配体形式取代,得到 [(CO)5M}2Sn(py)2] (1g: M = Cr, 1h: M = W)。发现双二齿配体 2,2'-双嘧啶 (bpmd) 仅配位 [(CO)5M}2Sn(bpmd)] 中的一个 [(CO)5M}2Sn] 实体